New fast pyrometers for non-contact temperature measurement in the mid-infrared spectral range

30. July 2019

Fast pyrometers PYROSPOT DA 44G and DA 44F

The mid-infrared spectral range (MWIR, wavelength between 3 µm and 5 µm) is of particular interest for applications in industrial non-contact temperature measurement. Examples are narrow band pyrometers around 5 µm wavelength for glass temperature measurement, around 4.5 µm (CO2 measurements), around 3.9 µm (measurements through flames) and around 3.4 µm (measurements on thin plastic films). Among others, thermopile infrared detectors have been used in these pyrometers. Consequently, due to the thermal time constants, only relatively slow pyrometers (response time between 10 ms and 100 ms) are possible.

Faster response times

DIAS Infrared is now expanding its range of PYROSPOT pyrometers, which are faster and more sensitive in the mid-infrared spectral range. This is possible through the use of new MWIR detectors. The first devices to come onto the market are the pyrometers PYROSPOT DA 44G for glass temperature measurement (around 5 µm, measurement temperatures from 50 °C to 2500 °C) and DA 44F for measurements through flames (around 3.9 µm, 100 °C to 2500 °C). The response time (t95) is only 5 ms.

These new PYROSPOT pyrometers have been presented for the first time from June 25th, 2019 at the trade fair THERMPROCESS (Düsseldorf, booth D78, hall 10). The new pyrometer DA 10G with a response time (t95) of just 1 ms is here also shown for very fast temperature measurements on glass (around 5 µm, 75 °C to 2500 °C).